Defense questions investigation in Pistorius case

Hearing ends with no decision on bail for Oscar Pistorius, final arguments Thursday

Police said Pistorius had testosterone in his home, but defense says it's a legal herbal medicine

Investigators say they believe the track star is violent and prosecutors call Pistorius a flight risk

Pretoria, South Africa (CNN) -- Sounds of arguing for an hour before the shooting. Blood stains on a cell phone and cricket bat. Boxes of testosterone and needles.

The shape of prosecutors' case against Oscar Pistorius began to come into focus Wednesday as they argued the Olympian charged with killing his girlfriend, model Reeva Steenkamp, should be denied bail because he might disappear if released from jail.

But the Olympic sprinter's defense team battled back, questioning the quality of the police investigation.

The bail hearing ended Wednesday with no decision. Final arguments are scheduled for Thursday morning.

Oscar Pistorius appears in the North Gauteng High Court in Pretoria on Monday, March 3. South Africa's double amputee track star is accused of the murder of his girlfriend Reeva Steenkamp on February 14, 2013.

Pistorius won gold for the first time at the 2004 Athens Paralympics. He won the 200-meter final and set a new world record. The South African sprinter has been called the "Blade Runner" because of his carbon-fiber prosthetic legs.

Prosthetic legs stand on the ground as Pistorius coaches children in Manchester, England, in April 2006.

Pistorius poses with his medals from the IPC Athletics World Championships in January 2011. He won three world titles there but lost the 100-meter T44 final to Singleton. It was his first loss in a race over 100 meters since the 2004 Paralympic Games.

Pistorius passes the baton to Ofentse Mogawane in a 4x400-meter relay race during the IAAF World Athletics Championships in Daegu, South Korea, in September 2011. Pistorius was the first double amputee athlete to compete at the World Athletics Championships.

Pistorius races in the men's 400 meters during the 2012 Olympic Games in London.

Pistorius competes in the London Olympics.

Pistorius carries the South African flag during the opening ceremony of the 2012 Paralympics in London.

Pistorius competes in a men's 400-meter T44 heat at the 2012 Paralympic Games.

Pistorius poses on the podium with his gold medal after winning the men's 400-meter T44 final at the 2012 Paralympic Games.

Pistorius receives his honorary doctorate from Strathclyde University in Glasgow, Scotland, in November 2012.

A picture taken on January 26, 2013, shows Pistorius and Steenkamp at Melrose Arch in Johannesburg.

Pistorius leaves the Boshkop police station with his face covered on February 14, 2013.

Pistorius, swamped by the press, leaves a Pretoria courtroom in June.

Photos: 'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

Photos: 'Blade Runner' Oscar Pistorius

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Photos: 'Blade Runner' Oscar Pistorius

South African model Reeva Steenkamp died early on February 14, 2013, after a shooting at the Pretoria home of her boyfriend, Olympian Oscar Pistorius.

This undated handout picture released on February 14, 2013 by "Ice Models" in South Africa shows model Reeva Steenkamp.

Capacity Relations, the agency that represents Steenkamp, announced her death. "She was the kindest, sweetest human being; an angel on earth and will be sorely missed," the agency said on Twitter.

The model was born in Cape Town and grew up in Port Elizabeth. She later moved to Johannesburg, where she worked for various companies, including Toyota and cosmetics maker Avon.

Steenkamp, who had a law degree, has also worked as a presenter for FashionTV in South Africa and as a FHM covergirl.

Her passion included cars and cooking, and she was set to appear in the Tropika Island of Treasure Show on Saturday, according to the show's website.

"We are deeply saddened and extend our condolences to Reeva's family and friends," the show said in a message on its website.

Steenkamp died after a shooting at the Pretoria home of Olympian Oscar Pistorius. She is pictured here on February 07, 2013 in Johannesburg, South Africa.

A picture taken on January 26, 2013 shows Oscar Pistorius posing next to his girlfriend Reeva Steenkamp at Melrose Arch in Johannesburg.

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

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Reeva Steenkamp in photos

Police version vs. Pistorius' version

Police version vs. Pistorius' version

Where was Pistorius when he shot gun?

Where was Pistorius when he shot gun?

And all Steenkamp's family wants is the truth, her half-brother Adam told CNN's Jake Tapper on Wednesday.

Oscar Pistorius appears in the North Gauteng High Court in Pretoria on Monday, March 3. South Africa's double amputee track star is accused of the murder of his girlfriend Reeva Steenkamp on February 14, 2013.

Pistorius won gold for the first time at the 2004 Athens Paralympics. He won the 200-meter final and set a new world record. The South African sprinter has been called the "Blade Runner" because of his carbon-fiber prosthetic legs.

Prosthetic legs stand on the ground as Pistorius coaches children in Manchester, England, in April 2006.

Pistorius poses with his medals from the IPC Athletics World Championships in January 2011. He won three world titles there but lost the 100-meter T44 final to Singleton. It was his first loss in a race over 100 meters since the 2004 Paralympic Games.

Pistorius passes the baton to Ofentse Mogawane in a 4x400-meter relay race during the IAAF World Athletics Championships in Daegu, South Korea, in September 2011. Pistorius was the first double amputee athlete to compete at the World Athletics Championships.

Pistorius races in the men's 400 meters during the 2012 Olympic Games in London.

Pistorius competes in the London Olympics.

Pistorius carries the South African flag during the opening ceremony of the 2012 Paralympics in London.

Pistorius competes in a men's 400-meter T44 heat at the 2012 Paralympic Games.

Pistorius poses on the podium with his gold medal after winning the men's 400-meter T44 final at the 2012 Paralympic Games.

Pistorius receives his honorary doctorate from Strathclyde University in Glasgow, Scotland, in November 2012.

A picture taken on January 26, 2013, shows Pistorius and Steenkamp at Melrose Arch in Johannesburg.

Pistorius leaves the Boshkop police station with his face covered on February 14, 2013.

Pistorius, swamped by the press, leaves a Pretoria courtroom in June.

Photos: 'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

Photos: 'Blade Runner' Oscar Pistorius

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Photos: 'Blade Runner' Oscar Pistorius

Oscar Pistorius appears in the North Gauteng High Court in Pretoria on Monday, March 3. South Africa's double amputee track star is accused of the murder of his girlfriend Reeva Steenkamp on February 14, 2013.

Pistorius won gold for the first time at the 2004 Athens Paralympics. He won the 200-meter final and set a new world record. The South African sprinter has been called the "Blade Runner" because of his carbon-fiber prosthetic legs.

Prosthetic legs stand on the ground as Pistorius coaches children in Manchester, England, in April 2006.

Pistorius poses with his medals from the IPC Athletics World Championships in January 2011. He won three world titles there but lost the 100-meter T44 final to Singleton. It was his first loss in a race over 100 meters since the 2004 Paralympic Games.

Pistorius passes the baton to Ofentse Mogawane in a 4x400-meter relay race during the IAAF World Athletics Championships in Daegu, South Korea, in September 2011. Pistorius was the first double amputee athlete to compete at the World Athletics Championships.

Pistorius races in the men's 400 meters during the 2012 Olympic Games in London.

Pistorius competes in the London Olympics.

Pistorius carries the South African flag during the opening ceremony of the 2012 Paralympics in London.

Pistorius competes in a men's 400-meter T44 heat at the 2012 Paralympic Games.

Pistorius poses on the podium with his gold medal after winning the men's 400-meter T44 final at the 2012 Paralympic Games.

Pistorius receives his honorary doctorate from Strathclyde University in Glasgow, Scotland, in November 2012.

A picture taken on January 26, 2013, shows Pistorius and Steenkamp at Melrose Arch in Johannesburg.

Pistorius leaves the Boshkop police station with his face covered on February 14, 2013.

Pistorius, swamped by the press, leaves a Pretoria courtroom in June.

Photos: 'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

'Blade Runner' Oscar Pistorius

Photos: 'Blade Runner' Oscar Pistorius

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Photos: 'Blade Runner' Oscar Pistorius

South African model Reeva Steenkamp died early on February 14, 2013, after a shooting at the Pretoria home of her boyfriend, Olympian Oscar Pistorius.

This undated handout picture released on February 14, 2013 by "Ice Models" in South Africa shows model Reeva Steenkamp.

Capacity Relations, the agency that represents Steenkamp, announced her death. "She was the kindest, sweetest human being; an angel on earth and will be sorely missed," the agency said on Twitter.

The model was born in Cape Town and grew up in Port Elizabeth. She later moved to Johannesburg, where she worked for various companies, including Toyota and cosmetics maker Avon.

Steenkamp, who had a law degree, has also worked as a presenter for FashionTV in South Africa and as a FHM covergirl.

Her passion included cars and cooking, and she was set to appear in the Tropika Island of Treasure Show on Saturday, according to the show's website.

"We are deeply saddened and extend our condolences to Reeva's family and friends," the show said in a message on its website.

Steenkamp died after a shooting at the Pretoria home of Olympian Oscar Pistorius. She is pictured here on February 07, 2013 in Johannesburg, South Africa.

A picture taken on January 26, 2013 shows Oscar Pistorius posing next to his girlfriend Reeva Steenkamp at Melrose Arch in Johannesburg.

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

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Reeva Steenkamp in photos

South African model Reeva Steenkamp died early on February 14, 2013, after a shooting at the Pretoria home of her boyfriend, Olympian Oscar Pistorius.

This undated handout picture released on February 14, 2013 by "Ice Models" in South Africa shows model Reeva Steenkamp.

Capacity Relations, the agency that represents Steenkamp, announced her death. "She was the kindest, sweetest human being; an angel on earth and will be sorely missed," the agency said on Twitter.

The model was born in Cape Town and grew up in Port Elizabeth. She later moved to Johannesburg, where she worked for various companies, including Toyota and cosmetics maker Avon.

Steenkamp, who had a law degree, has also worked as a presenter for FashionTV in South Africa and as a FHM covergirl.

Her passion included cars and cooking, and she was set to appear in the Tropika Island of Treasure Show on Saturday, according to the show's website.

"We are deeply saddened and extend our condolences to Reeva's family and friends," the show said in a message on its website.

Steenkamp died after a shooting at the Pretoria home of Olympian Oscar Pistorius. She is pictured here on February 07, 2013 in Johannesburg, South Africa.

A picture taken on January 26, 2013 shows Oscar Pistorius posing next to his girlfriend Reeva Steenkamp at Melrose Arch in Johannesburg.

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

Pistorius' girlfriend dies on Valentine's Day

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Reeva Steenkamp in photos

Pistorius is charged with premeditated murder in the death of Steenkamp in the early hours of Valentine's Day. He has said he thought he was shooting at an intruder.

But police investigator Hilton Botha told the court Wednesday that Pistorius, 26, wasn't acting in self-defense when he shot through the door of a toilet room in the bathroom of his home and killed Steenkamp.

Botha said he believes Pistorius knew Steenkamp was on the other side of the door. He didn't explain why investigators think that but suggested Pistorius was specifically aiming to hit the toilet where Steenkamp had gone.

But he also said investigators have found no evidence that is inconsistent with Pistorius' story.

Prosecutors spent much of the hearing Wednesday focused on the bathroom of Pistorius' Pretoria home, where authorities say the track star shot Steenkamp three times, in the hip, elbow and ear.

Bullet trajectories show that Pistorius had to turn left and fire at an angle to aim at the toilet, Botha testified. Had he fired head-on into the door, he would have missed her, Botha said.

Defense attorney Barry Roux disputed that, saying the evidence does not show there was an effort to aim at the toilet.

Prosecutors are trying to prove Pistorius intentionally fired on Steenkamp, 29, in a premeditated attempt to kill her. Pistorius and his lawyers argue he mistook her for an intruder and killed her accidentally.

Pistorius said in a statement read Tuesday by his lawyer that he believes Steenkamp slipped into the bathroom when he got up to close the balcony door in his bedroom in the early hours of February 14.

Remembering Reeva Steenkamp

Remembering Reeva Steenkamp

Uncle: Oscar is a survivor, peacemaker

Uncle: Oscar is a survivor, peacemaker

Reeva Steenkamp laid to rest

Hearing noises and gripped with fear that someone had broken into his home, Pistorius said he grabbed his gun, yelled for the intruder to leave and shot through the toilet-room door before realizing the person inside might have been Steenkamp.

Roux said Wednesday that the defense team believes Steenkamp locked the door when she heard Pistorius yelling for the intruder to leave. He also said Steenkamp's bladder was empty, suggesting she had gone to the bathroom as Pistorius claimed.

Botha also said police believe a blood-stained cricket bat found in the bathroom was used to break down the locked door to the toilet.

Pistorius said in his statement that he used the bat to break down the door in an effort to get to Steenkamp to help her.

Botha agreed with the defense contention that, other than the bullet wounds, her body showed no sign of an assault or efforts to defend herself.

But prosecutors and Pistorius' defense battled over allegations that testosterone and needles were found at the home, as well as the quality of the police investigation.

Amid speculation by outsiders to the case that steroids or other drugs could have somehow played a role in the shooting, Botha testified that investigators found two boxes of testosterone and needles at Pistorius' home.

Under questioning by Roux, however, Botha said he hadn't read the full name of the substance -- which Roux said was an herbal remedy called testoconpasupium coenzyme -- when investigators took the materials into evidence. A quick Internet search on the name of the substance yielded no results.

He also said the defense forensics team found a bullet in the toilet that police had missed and noted police had failed to find out who owned ammunition found at the home or photograph it.

Investigators also went into Pistorius' home without wearing protective foot covers to prevent contamination of the crime scene, Roux said. Botha conceded that was true and said it was because police didn't have any more of the covers left.

Roux questioned police arguments that a witness heard sounds of an argument before the shooting. The witness, Roux said, lives 600 meters (more than a third of a mile) from Pistorius' home. Prosecutor Gerrie Nel countered that the witness lives 300 meters away.

Would he run?

Botha told Magistrate Desmond Nair that investigators believe Pistorius is violent and might flee if released from jail.

He described two encounters with Pistorius, one in which Botha said the track star asked someone else to take the blame when a gun went off at a Johannesburg restaurant.

Police said the second incident took place at a racetrack, where Pistorius allegedly threatened to assault someone.

Authorities have also said they have responded to previous domestic incidents at Pistorius' home, but have not elaborated.

In his statement Tuesday, Pistorius said he and Steenkamp were deeply in love and said he was "mortified" over her death.

High hurdle

Defense attorneys are trying to overcome South African law, which makes it difficult for defendants accused of premeditated murder to get out on bail. The law requires evidence of "exceptional circumstances" to justify release.

Nair upgraded the charge against Pistorius to premeditated murder Tuesday, saying he could not rule out the possibility that the track star planned Steenkamp's death. But Nair said he would consider downgrading the charge later.

In a statement read by his lawyer Tuesday, Pistorius said he would not try to flee or influence any witnesses if he is allowed out on bail, and he said his release wouldn't be a danger to public order.

Case rivets fans and friends alike

The case of the global sports hero known as the "Blade Runner" has riveted stunned fans around the world.

Social media reaction to the case appeared to come down against the sports star but was still noticeably mixed on CNN's Facebook page.

New photos of woman killed by Pistorius

Steenkamp 'wanted to make a difference'

Pistorius' prior police run-ins

Steenkamp's brother on Pistorius' story

"There's no amount of tears that will save you," said Anthonia Nneka Nwabueze. "Pistorius must face the law for brutally killing an innocent girl -- Reeva."

"My favorite athlete but what he did is grave and must be punished," Carlos Alvarez Ochoa said.

But another person who posted called for patience.

"(N)one of us were in the house when his girlfriend was murdered, let's hold off on casting stones at Oscar Pistorius," said Adrian van Liere Since. "Just like anyone else, he deserves a just trial, and in my eyes remains innocent until proven guilty."

"I would just like to say, I have dated Oscar on off for 5 YEARS," Jenna Edkins said on Twitter. "NOT ONCE has he EVER lifted a finger to me, made me fear for my life."

In an interview for Wednesday's "Anderson Cooper 360," Adam Steenkamp told Jake Tapper "there was no indication that anything was bad. I mean, we know Reeva. We knew Reeva. She was happy. And if Reeva was happy, everything was OK... and everything was good, then everything was normal."

Steenkamp said he never spoke to his half-sister about Pistorius, and she didn't discuss the relationship much -- if at all -- with anyone in the family. So, without any in-depth knowledge, his family keeps vacillating about what the evidence suggests happened, he said.

"At a time like this, when people are grieving, I think it's hard to keep a clear mind on anything," Steenkamp said. "And with the added pressure and the media coverage and the interest, you know, from the world looking into this story, it's a rather unnatural situation. So, I suppose I would agree with everyone is flipping from one side to the other. We just don't know. You know, all that we want is we want to know what the truth is, and I think that's what everyone else would like as well. You know, to be able to make something of this -- to be able to deal with this and have something positive come out of this."

Steenkamp said the worst is over.

"We are all holding up very well considering the circumstances. We've now had just about a week to let things sink in. And we've had a very busy few days as well," he said. "I feel like we have done the most difficult thing for us as a family, so far, in viewing my sister's body, and then attending her memorial yesterday. We're doing OK."

CNN's Robyn Curnow and Kim Norgaard reported from South Africa, and Mike Pearson and Ed Payne reported and wrote from Atlanta. CNN's Nkepile Mabuse, Jake Tapper, Kara Kasarjian and Mark Morgenstein also contributed to this report.